package adv8;

/**
 * @author oldliu
 * @since 1.0
 */
public class TestSon {
    public static void main(String[] args) {
        //遮罩效应
        Father f=new Son();
        f.show();

        Son s=(Son)f;
        System.out.println(">>>>>>>>>>>>>>>>>>>>");
        s.show();
    }
}
